[Rockin Robbins]

Yes, but that's not the crew taking it into their own hands to put the boat at full throttle. That's them obeying your orders. And it will stay full throttle until you order otherwise too. Great way to lose all your fuel and not get back to base...

Now it's true that could never happen in a real submarine. We can't pretend we're getting realism here. We have to accept the hard coded defects in the game and make the best of them. Check out the possibility carefully before you reinstall.